Berlin commuters got an unwelcome reminder of their city’s wartime past today when a bomb from World War II was discovered near the city’s main railway station.

The Hauptbahnhof was closed for several hours as bomb disposal experts dealt with the device, the BBC reports. Flights to and from Tegel airport were diverted.

The device was a 220-pound Soviet bomb and was discovered at a building site a mile north of the train station. While this may seem to be too far away to cause concern to those using the station, German bomb disposal experts are extra careful, especially after three of their number were killed while attempting to defuse a wartime bomb in Gottingen in 2010.

The bomb has now been defused and taken away. All transport has resumed.

Berlin was hit hard in World War II. As you can see from this image taken by the British army shortly after the war, the city was pretty much leveled. Nearly half a million tons of ordnance was dumped on the city and an estimated one in eight bombs didn’t go off. While most explosive devices were cleaned up in the months after the war, they’re still being uncovered on a regular basis.

Germany isn’t the only country that has to worry about wartime ordnance. In 2001, workers found a World War II grenade near Gatwick Airport in England.